Rotary steam-engine



.NTTED STATES PATENT OFFICE.

D. GRANNIS AND D. E. BRAND, Oll COLLINS, NEW YORK.

ROTARY STEAM-ENGINE.

Specification of Letters Patent No. 316, dated July 29, 1887.

To all whom it may concern.'

Be it -known that we, DAviD GRANNIs and DAVID E. BRAND, of the town ofCollins, in the county of Erin and State of New York, have invented anew and useful Improvement in Steam-Engines for Propelling Boats,Locomotives, Manufactories, and other Machinery, which improvement is ont-he rotary principle and is called a Rotative Engine5 and we do declarethat the following is a full and exact description thereof. V

A cylinder is formed in the following manner: Is made of cast-iron orsome other firm metal the body of the cylinder of sufficient length toadmit the contemplated wheel to run inside of the head o-f the cylinder, on the edges of which flanges are made and turned perfectly trueto correspond with the two heads of the` cylinder, which heads are to beof cast iron turned equally true, with a hub in the center on theoutside for the shaft to pass through. rThe heads and body of thecylinder are then fastened together with screw bolts. Before putting thecylinder together, a wheelof cast iron or some metal is made, theheighth of which shall nearly lill the vacancy between the heads of thecylinder, but the diameter of which shall be as much less than that ofthe cylinder as the width of the bucket intended to be operated upon.Flanges are also raised on the ends of the wheel, turned true so as tofit perfectly up to the inner surface of the cylinder. The outer surfaceof the wheel between the flanges must be turned perfectly true. Astationary valve or stop is inserted between the flanges of the wheel tofill the vacancy between the body of the wheel and the inner surface ofthe cylinder, to be fastened by screw bolts passing through thecylinder. This confines the steam on one side of the wheel. The body ofthe wheel is made in the form of a cylinder, with a plate or head in thecenter with a hub on both sides of it through which the shaft passes-twogains are made through the body of the wheel between the ianges directlyopposite each other and of sufficient depth in the plate of the wheel toadmit the bucket to draw so as to pass the stationary valve, the bucketsare made to fill the gains in the wheel, but the gains in the plate aremade some larger to admit a roller to work in it which is attached tothe bucket to prevent it from cramping; and in order to draw the bucket.under the stop a circular groove. is turned 1n each head of thecylinder a little within the circle of the rim of the wheel. Or it maybe preferable to raise a guide on the head of the cylinder upon which acrotch on the end-of the pin is to be fitted. This groove, or guide, ison a true circle two thirds of the way around or more, it then divergesinwardly as much as you design to draw the bucket, so as to pass thestop. On the inner edge at each end of the bucket an eye is formedthrough which a pin passes, the ends of which fill the grooves or fit onthe guide in the head of the cylinder. This pin when running in theregular groove, or on the guide carries the the bucket out to the innersurface of the cylinder. When the steam lets olf, the pin passes throughthe eccentric groove, or upon the excentric guide, draws the bucketunder the stop and passes out again into the regular circle, lilling thevacancy between the wheel and the cylinder. The roller before mentioned,works on the same pin beneath the eyes of the bucket and rolls in thegain cut in the plate of the wheel. Packing plates may be used andfastened to the flanges of the wheel wth a hollow turned ,in the edge ofthe flanges and plates to receive the packing,

and may be tightened by screws as occa.

sion may require, the wheel must be hung and turned on the shaft, andthe shaft so turned as to now close in the heads of the cylinder. Oneach side of the stop is an insertion made into the cylinder, one forthe steam pipe, the other for the eduction pipe. Or if it is desired towork the wheel both ways, two insertions may be made on each lid of thestop.

What we claim as our invention and desire to secure by Letters Patent,is-

The manner above described of working the draw buckets by means of pinsworking in grooves, or upon guides made upon the inside of the heads ofthe cylinder.

DAVID GRANNIS. DAVID E. BRAND.

Witnesses:

JOSEPH PLUME, JOHN L. HENRY.

